Weighting motion of looms for weaving



Oct. 30, 1928.

w. GLEDHILL I WEIWGHTING MOTION 0F LOOMS FoR WEAVING Filed July 21, 1926 R m 1 8C V. m 1 k. a w r. 9 w. t a I. I .8 7 7 F 0 4 1/ 0? F t M 4 n 1 J J 5 0 Patented Oct. 30, 1928.

VSTI E LLIAM''GL IEDI-11112121; or BABK SL P, NE 34 154 1; jE qIl ii' t f wmcmm norm): or Lccmsroa wmvmci;

Application filed July 21;-192e, Seria1. N0l-124,040,and in arm Britain';ni1yao,"1925 5 This invention relates to a 100m weighting motion and has for its chiefobjeetto con-j struct same in such manner that in addition to dispensing with all weights it will keep a uniform width of cloth fromone end of a pieceto the other. a 3

According to this invention meansarc provided whereby variation in the diametcr of the warp ,beam as it unwinds automatically decreases the tension, of the ropesor-chains which pass around the necks or ruflies of the rp bea a 1 f In the accompanying drawings Figure 1 is an end view of par-tot a loom fitted with aweighting motion "in accordance with this invention and y 1 Figure 2 is a similar view showing a modification. 1

Referring to Figure 1 A indicates a whip roller that is rotatably mounted at each end in an arm a which is rigidly fixed .on a shaft a which extends across the 100111 and is carried at each end by a bracket a detachably secured on the loom end frame B and formed with recesses aito enable the shaft a to occupy different positions. Each arm a is connected to the upper end of a rope or chain 0 which passes around the neck or ruflle c at each end of the warp beam C. The lower end of each rope or chain is attachedto a bar 0 that extends across the loom and is cranked near its ends and mounted at each end in a lever 0 Each of these levers extends acrossthe loom end frame and is pivoted to the front portion thereof at 0 resistance being offered to the upward movement of each lever by a strong spring 0 To enable the weight to be taken off the ropes or chains c when it is required to turn the beam back,or remove it, the cranked rod 0 is provided with a handle 0 which can be turned to raise the rod and so take the tension off the ropes or chains. The device for automatically regulating the tension exerted on the ropes or chains 0 as the warp beam C decreases in size comprises a plate or shoe E. This plate or shoe is pivota-lly mounted on the upper end of an arm 6 that is shown pivoted at e in a bracket 0 attached to the lever 0 although it might be bolted or otherwise secured to theloom end frame. Rigidly fixed on the shaft 0 is an arm 0 and pivotally attached to such arm is a-link e which passes between two plates 6'' and is" connected therewith byf albolt and mum. Carried by the plates c is a roller ctwhich is caused to bear against the, underside of the lever aeby, a link, e whichlishooked fltvltS lower end toa stud eW-carriedby theplatesc and adjustablyconncctcd at itsupper end to anarm pfi by-anute-tfithe said arm a -bei1ig rigidly fixedon the shaft a t, this construction beingthe same at each end of the loome- ,The armsla and ctprovide a lever r01.- which the shaft 01 is the fulcrum. When' the [warp beam is"; full the parts occupy; the position shown,

' p but as the beamdecreases'insize the upward turning movement of the arm a is caused the roller 6 graduallytravellingtowardsthe fulcrum 0 .withthe resultthat; thearm af? gradually and slightly rises thereby slightly slackening the tension on the rope or chain c and automatically decreasing the brak ing action of the latter on the rufile of the warp beam. As the roller 6 moves toward the fulcrum c it permits the le ver a to rise under the pressure of the warpbank upon the whip roller A on the ends of the arms a. .When the lever a rises the lever '0" is permitted to move down under the pressure of thespring a", but instead of this counteracting the relaxing efiect upon the brake it is clear proof that the brake is becoming relaxed. The spring a is used to give a flexible grip to the chain 0 around the ruflle and allows the" beam to oscillate as the shed opens and'closes, and the spring 0 in expanding; shows that the tension on the chain is becoming decreased. The action of the link 6 on the arm a can be varied by ad 1 presented more of an incline to the roller 6 In the modified construction shown in Figure 2 which is intended for use in looms that are fitted with large rufilesc the whip roller A is mounted on arms a that are separate from the arms a to which the upper ends of the ropes or chains care connected. In this construction the position ofthewhip roller can be adjusted in relation to the arms aand the warp threads C remain in contact with the rod a during the lifting and lowering movement of the whip roller A that is brought about by the opening and closing of the shed.

1 What I claim as my-invention and desire to secure by Letters Patent in the United States 1s 1 1. In a loom weighting motion, the'combination with a warp beam, of two levers, a flexible element connecting. the levers and having a frictional connection with the beam,

one lever having a warpengaging member,

a link connection between said levers, and means controlled by the decrease in diameter of the beam for controlling said link connection to swing the levers relatively to one another and slackensaidflexibleelement;

2. In aloomweighting motion, the combination witha warp beam, of two levers," a flexible element connecting the levers and having a frictional connection with the beam, one lever flexible element connecting the levers and having a frictional connection with the beam, one lever having a warp engaging member, a

movable connection with the otherlever to swing the levers relatively to one another, an armadapted to bear against thebeam to be moved by the decrease in diameter of the beam, and a link connection between the arm and firstnamed link to shift the firstnamed link by the decrease in' diameter of the beam so as to slacken said flexible element. 1

4. In a loom weighting motion, thecom I link connected with said lever and having a binationwith a warp beam, of a lever abovesaid beam, a. lever below the beam,-a flexible element connecting said levers and having a frictional connection with the beam, the uplper lever having a warp engaging member; a

link connected to the upper lever and 'hav-V ing a slid-ingconnection with the lower lever for swinging the levers relatively to one another, an arm to bear against tlie beamand to move by the decrease in diameter of the beam,

and a link connection between said arm and link. i

In testimony whereof afiix mysignature;

WILLIAMGLEDHILL, 

